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SELF AND J.v H. RILEY, .OFSAME PLAGE.-

Leters Patent No. 8Q,765,clateol August 4, i868.

IMPROVEMEET IN HARNESS ROUND KNIFE.

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TO ALL WHQMAIT MAY'CONCEN: l

Be it known that I, J. H, QUACKENBUSH, of' Springtielchin the county of Hampden, and Commonwealth of MassachusettsQhave invented a' new-and useful Improved Harness vRound Knife and Ido vhereby declare that the following is a full, clear, and exact description thereof', reference being had to the accompanying drawings, making a part of this specification, and to the letters of reference marked thereon, in which- Figure 1 is a side view of a knife, with my invention applied.

Figure 2 is another view of the handle and socket, with the blade removed.

The nature of my invention consists in the construction of a harness-makers round knifeJWhereby the blade may be made movable in its handle or socket, so that each corner of the Yblade may be more properly adjusted for certain operations in cutting out vdifferent kinds of work than can be done by the use of the ordinary :round knife. 4

It is well known that-the ordinary round knife is `not particularly adapted to any particular kind of work, unless itis so permanently constructed,*and` then the constant use ofeaeh particular point in doing its peculiar :kind of work, wears the point away much fasterthan would be the case if the blade were adjustable in its handle or socket.

bly-invention is intended to obviatethese objections, as I construct the knife in such manner that theblade can` be adjustedat any desired angle with reference to the handle, and is-so arranged that one corner of the blade may be used for one kind ofwork, and, by` a dilferent adjustment of the blade in its socket, the other corner cf the blade may be used for the same kind of work, so that the corners of the blade will wear or last much longer than when the knife is made in the ordinary manner, and the blade may be set at any desired angle, to suit the operator, A 1 l' Y Another advantageof myinvention is, that different sizes and shapes of blades may b.e made for one socket or handle, and, by the use of a proper screw or pivot, when one blade becomes worn or injured from use, it is easily and quickly removed, and anotherinserted in its place; or, for diierent kinds of work, diiferent blades may be used in the same handle, making a Set of knives much cheaper than la set made in the ordinary manner.

That others skilledin the art may be able to make and use my invention, I will proceed to describe its construction and mode of operation. I

In the drawingsg represents the handle ofthe knife, into which is inserted the socket Z1, having a ,longitudinal slot, z', made therein.

Through the socket b, and perpendicular to -the slot z', is a hole, e, and near the end of thefsocket b is another hole, having a thread cut therein, into 'which is'itted the screw ci, which has a head with a slot cut therein, in which to insert a screw-driver,l or other instrument, to turn it, or may be a thumb-screw,` and be turned with the hand. i

The blade A'has a perforation in its shank, b', through which passes the pivot c, and at ei's -a-curved slot,

formed on the arc oi' a circle, having for its ccntre'the centre of the Vrivet oi pivot c, said Vcurved slot e being of the proper length, and of a width to admit the insertion ofthe threaded portionl of the screw al. The corners, h l, of the blade are made quite pointed and sharp, in the usual manner.

1 fis a ferrule, to preserve the handle, and keep the-socket b fast therein'.

Its operation is as follows: f

The blade A being secured in the slot z' of the socket b, by means cf the pivote, which may be a small screw, if desirable, the screw d is inserted in its threaded hole in the socket b, and also passing through the curved slot e in the blade A. If it is desired to4 use one point, 7L, for cutting out fine work, the blade A is turned to one side, as shown in red lines in fig. 1, and the screw d is then turned in tightly, which causesiboth sides of the socket b to clasp tightly the' sides of the/blade A, thus holding said bladeA securely in that positicn.

If, in cutting', the handle g is now heldin Ya horizontal position, with thelpoint h downward, a small portion only of the said point h enters the leather, which is particularly desirable in certain kinds of work.

On the other` hand, if the handle g be held in a horizontal position, with the point l downward, the said point'l, with a very considerable portion of the edge of .the blade forward of the point Z, will enter the leather, in the operation of cutting, and this feature is favorable for certain other kinds of work. v'lhen, if it is desired `to changel points, to prevent rapid and uneven wear, thescrew d may be slightly loosened, the blade be turned v upon its pivot c to the other side, or to a corresponding opposite position in its socket, and the screw-cl tightened again. The point lrmay now be used 'forlfineeutting and th'epointh for other straight or coarse wor-k.

I am aware that a stationary round knife has long4 been in use, but never, to my knowledge, has such a knife been inade adjustable. y Having thus described my invention, what I claim as new', and desire to secure by Letters Patent, is

The blado A, hav-ing the curved slot e therein, and hung in the slot z' of the socket 6 by means of the pivot c, and secured in position in said slot z' by means of the screw d passing through, or partially through, the socket b, and through the curved slot e, the whole forming a harness-knife, yand constructed and operati-ng substantially as herein described, and for the purposes specified.

. J. H. QUACKENBUSH.

Witnesses:

T. A. CURTIS, E.y E. RICE. 

